LED vs Laser

Complete Guide to Laser Hair Therapy, LED Vs LASER, and More

Written by: prerna khemka


LED vs Laser: The Complete guide to LLLT Laser hair therapy for promoting hair growth and treatment of hair loss?

If you have hair thinning, chances are you’ve probably come across a laser comb, or helmet or cap, either online or heard about it through someone or seen an ad somewhere! 

More likely than not, you probably brushed it as a gimmick, or you started researching online and were overwhelmed with the choices and conflicting info out there! Some of you may even have purchased something which you didn’t use or didn’t work and so gave up on the whole thing!  

To help you and millions of others avoid this confusion, waste of money, precious time and energy, we have written a complete, detailed and science backed guide on Low Level light Therapy (LLLT) for hair growth. It covers all your questions and concerns! So keep reading! 

low level laser therapy

So just what is LLLT?


LLLT is an acronym for Low Level Light Therapy which is a non-invasive medical treatment that utilizes RED laser or RED LED light energy below a specific energy threshold and within a specific wavelength. It is used to stimulate healing and reduce pain and inflammation in tissues. When it comes to hair loss, LLLT works by stimulating blood flow and nutrient delivery to the hair follicles, promoting cellular metabolism and DNA repair, and reducing inflammation. 

Further,  by stimulating the follicles and improving ATP production, low level light therapy reverses hair miniaturization and helps kicks the hair back into growth (ANAGEN)  stage and extends the growth phase as well. Visible results can be seen in 4-6 months and include thicker hair, new hair growth, better texture, overall healthier hair and stabilization of hair fall, i.e. stopping of hair fall. It is also noted that LLLT reduces the impact of DHT related hair loss by reducing the 5 alpha enzyme activity in the scalp.

tech of our laser

How Low Level Laser Therapy Helps Prevent Hair Loss And Balding

LLLT can help prevent hair loss and balding by:

  • Stimulating Hair Growth: LLLT can help promote hair growth by increasing blood flow and nutrient delivery to the hair follicles, promoting cell metabolism and DNA repair, and reducing inflammation. It can also help extend the anagen (growth) phase of the hair cycle, increase the size and strength of hair follicles, and reduce the level of DHT.
  • Strengthening Hair: LLLT can help strengthen hair by increasing the production of collagen and elastin, which are essential PROTEINS FOR HEALTHY HAIR GROWTH.
  • Reducing Hair Loss: LLLT can help reduce hair loss by reducing inflammation, improving blood flow and nutrient delivery to the hair follicles, and reducing the level of DHT.

Do All LLLT devices use Laser AND LED?


Exploring the Crucial Differences Between LED and Laser in Light Therapy for Hair Growth. 

When it comes to healing and beauty through light, the terms "Light Therapy" or "Low Level Light Therapy (LLLT)" are often used. What many don't realize is that there are two types of diodes used in these therapies—LED and Laser—and the type of diode makes a significant difference in the effectiveness of hair growth treatments. Thus, two seemingly identical Low Level Light Therapy devices may differ greatly in effectiveness because one may use LEDs while the other uses lasers.

Continue reading to learn about this CRUCIAL difference between LED and Laser, their suitability for different applications, and how to make the right decision for yourself. Most importantly, learn how to avoid gimmicky products that look the same but do not work!

Think of LED as a gentle, quiet helper. It uses light that isn’t very strong to help heal sore or damaged parts of the body without getting hot or hurting the skin. It’s like a soothing balm at a light level, helping cells to fix themselves and calm down swelling.

On the other hand, medical grade laser diodes are the powerful workers. They use a strong light that can do things like cut through tissue or help smooth and shape the skin by using heat. It’s a more intense treatment that can really change how things look and feel.

LASER = Light Amplification by Stimulation of Emitted Radiation

This simply means that a source of light is amplified within a gain medium and emitted in a specific way. LASER produces a very intense beam of light which has the following properties:

  • Monochromatic (meaning it consists of one wavelength)
  • Coherent (meaning all parts are in phase)
  • Collimated (meaning all parts travel in one and same direction)

LED = Light Emitting Diode

And it’s pretty much just that. A diode that emits light when electricity passes through it. Often in pretty colors. LED light can produce collimated light (with a focusing lens) but not coherent light thus they do not concentrate all their power in a coherent beam.  Laser diodes by definition produce effective collimated and coherent light output.

Do all Hair Growth devices use laser or LED? 

FAQs About Medical-grade Pure Laser Hair Therapy - Grow Laser 272

Specifications: uses true-medical grade, precisely calibrated 5 mw lasers because the output penetrates deeper, better, and is clinically proven to be therapeutic for their specific purpose. Laser light does not spread as much as LEDs over the same distance, which allows lasers to penetrate tissue to a deeper level with higher concentration. For photobiomodulation therapy, the farther the light is from the target, the less intense and less effective the treatment will be. For light therapy to be effective, it needs to reach the cells that respond well to photobiomodulation therapy.

Frequently Asked Questions

man in a laser hat

How long do I have to continue Grow Laser Cap treatments?

Think about LLLT like brushing your teeth, or working out. If you have been working out for a long time, the results will stack over time. But if you stop working out one fine day, you will not lose results gained overnight, but slowly, you will notice a decline in your health.

Similarly, We recommend using Grow Laser for at least 4-6 months consistently. After that period, you should continue sessions for best results. If you discontinue treatment, you will lose the benefits eventually over a period of time. 

Are all LLLT devices safe to use after transplant surgery?

No. After transplant surgery, it is important that your scalp does not come into direct contact with any foreign object. Many devices use teeth or spikes that are studded with a laser. You should not use such devices as they will damage your transplant. Instead, use a device that covers the entire scalp but does not directly touch the scalp. At the present time only the Grow Laser 272 LLLT device is safe and effective for patients immediately following transplant surgery. 

How does the Grow Laser 272 compare to other hand held devices?

The Grow laser 272 is the best value on the market because it has 272 pure laser diodes, 7-minute treatment time, flex cap, auto switch off, and portable rechargeable battery, 3-year warranty, and a very competitive price of $1495. There are many imitation products on the market that use a combination of LED and LASER, but Grow laser is medically backed by the world’s top hair transplant surgeons such as Dr. Roy Stoller & Dr. Anthony Mollura, Dr. Ronald Shapiro. It uses medical-grade, precision laser technology for uniform dosage and accurate dosage of 650nm of wavelength and optimal power of 5mw per diode. Our laser diodes last well over 6-10 years while most devices lose their intensity within a short span of 2-3 years. Our laser cap also comes with our 6-month refund guarantee along with expert medical management by our hair loss professionals.

Also, many similar-looking laser caps may not have the features of a shorter condensed treatment time, auto switch off, auto sensors, flex cap technology, transparent silicone casing for maximum light transmittance and most importantly the refund guarantee and unlimited warranty that you get from a physician-backed device vs a consumer device available on a marketplace.

Click here to see complete comparison chart

Do physicians advise the use of LLLT for hair growth?

Yes, Medical Doctors, including dermatologists, in the United States, Europe and Asia prescribe the Grow Laser 272® for use with male & female patients suffering from androgenetic alopecia. In fact, LLLT it is the #1 physician recommended treatment for hair growth at home.

There are so many treatments for hair loss. How to decide?

There are many treatments for hair loss being marketed. They could range from OTC plant-based serums and vitamins, to pharma drugs to PRP or surgery, Not everything works for everyone, and each has their own strengths and disadvantages. To understand the options and their suitability for you and to make the best-informed decision, please download this pdf. 

In terms of side-effects, however, it is important to note that LLLT has no known side-effects, is drug-free and safe and effective for both men & women. Moreover, if desired can be combined with other therapies. For your convenience, we have compared ALL The hair loss treatments being sold on the market here (include pdf)

Can LLLT be used with treatments such as Rogaine or Propecia?

Yes, you can successfully combine Grow Laser 272 with other hair loss treatments, such as a good DHT blocker, vitamin, as a post-surgery growth enhancer, and with PRP for maximum results. In fact, combination therapy is recommended. However, unless you are in advanced stages of hair loss, we recommend that you start with non-surgical treatment options first and then move on to invasive and surgical options such as PRP and Hair transplant surgery. If you need help figuring out what is the right course of treatment for you, you can either take this quiz or consult your physician.

How long will I need to continue Grow LLLT sessions?

Hair loss is a progressive condition. If untreated, you can expect to lose more hair over time. After the initial 4 to 6 month LLLT treatment period, you should continue sessions for best results. Think about LLLT like brushing your teeth, or working out. If you have been working out for a long time, the results will stack over time. But if you stop working out once fine day, you will not lose results but slowly over time.

I just noticed my hair is beginning to thin — is it too soon to start LLLT sessions?

It’s never too early to start LLLT therapy! It’s completely safe and uses the power of light to metabolize hair cells. So even if you are just starting to see early thinning, it’s a perfect time to buy the Grow Laser 272. As with any health-related condition, the earlier you start, the easier it is to reverse the condition, and also easier to halt further hair loss. So, actually, the sooner you start, the easier it will be to combat hair loss. LLLT hair treatment should be incorporated into your weekly preventative maintenance routine to preserve and strengthen existing hair and provide a healthy environment for continued growth.


Can LLLT be used after transplant surgery?

Yes. LLLT can be used as early as 3 days after transplant surgery. Doctors have reported that using LLLT can help stimulate healing of the wounds, and improve transplant results in hair loss patients. In fact, most hair transplant surgeons worldwide have chosen to use the LLLT to improve results and prescribe LLLT as mandatory post hair transplant for faster recovery and better growth. Overall, patients using LLLT post hair transplant get excellent hair transplant results which is why HT surgeons swear by LLLT as a maintenance measure for their patients. Consult with your transplant surgeon for more information.

Are all LLLT devices safe to use after transplant surgery?

No. After transplant surgery, it is important that your scalp does not come into direct contact with any foreign object. Many devices use teeth or spikes that are studded with a laser. You should not use such devices as they will damage your transplant. Instead, use a device that covers the entire scalp but does not directly touch the scalp. At the present time only the Grow Laser 272 LLLT device is safe and effective for patients immediately following transplant surgery.

Is Grow Laser 272® safe to use at home?

The Grow Laser 272® is completely safe to use at home. It comes with a portable power pack that automatically switches off after 7 minutes to prevent over-use in case the user forgets to turn it off. treatment for use at home or while travelling. Also this technology has been cleared for both SAFETY and EFFICACY by the US FDA.

When will I know if Grow Laser 272® is working for me?

Every person is different. The Hair Follicle cycle is a 4 month cycle. So it takes atleast 4 months to see visible results. In the first month - you will most likely experience a decrease in your hair fall and by month 3 you will experience an improvement in the quality of your hair - meaning, your hair will be silkier, shinier, more manageable, bouncier, and will feel much healthier. For visible results through the naked eye - however it can take upto 6 months, sometimes even more. 

what you can expect

Do I need to wash my hair or use a special shampoo before using Grow Laser 272®?

You can use your normal shampoo to keep your hair and scalp clean. For best results, use HS Protect shampoo & conditioner.

Are there any negative side effects associated with using the Grow Laser 272®?

No. Testing and user testimonials have shown no side effects when utilizing the Grow Laser 272® with LLLT for hair growth.

Safety FAQs

Is Grow Laser 272® regulated for safety?

Yes. The Grow Laser 272 uses Class 3R Lasers which are recognized as safe by worldwide governing medical bodies. It meets the safety guidelines established by the United States and many foreign governments for safety. The Grow Laser 272 is manufactured according to ISO 13485, the most stringent standard for medical device products.

Does the Grow Laser 272® emit any heat or radiation?

Only low—energy laser and LED light is used. Clinical studies have shown that Low—Level Light Therapy (LLLT) is safe. LLLT has been used for decades in hair restoration clinics. Be assured that the Grow Laser 272's non—invasive laser technology is perfectly safe.

Is Grow Laser 272® safe to use for a woman?

Yes. The Grow Laser 272® is an effective treatment for hair loss in most women, or for thinning hair in women. Infact it is only one of two treatments cleared by FDA for hair growth in women.

Can I use the Grow Laser 272 while nursing or while pregnant?

We do not recommend using the Grow Laser 272 laser Cap while being pregnant or while nursing, unless specifically approved by your physician.

Is it safe to use finasteride (Propecia™) and/or minoxidil (Rogaine™) while using Grow Laser 272®?

Yes. The Grow Laser 272® is safe to use with Rogaine® or Propecia®. There are no contraindications with these medicines.

Image of Author Prerna Khemka

About the Author

Prerna Khemka

Our founder, Prerna Khemka, confronted hair loss in her twenties. Fueled by a profound passion for Ayurveda and equipped with insights from Western technology, she embarked on a transformative odyssey. Determined to find a solution that resonated with her cultural roots, Prerna delved into extensive research and innovation. The result? A line of clean, effective products that not only revived her own hair but also empowered countless others facing similar challenges.